A painful dragging of the sideburn in a upward motion against the grain of the hair growth.
Example: Place your right hand on the top of a person's head and then extend your thumb down to make firm contact with the person's sideburn. In a swift action, drag your thumb in an upward motion while keeping your thumb tightly pressed upon the victim's sideburn. This action should cause the victim a brief moment of harmless yet amusing pain.

"Jason didn't think it was funny when Barry would sneak up and do the sideburn drag on him."